merge_transcripts.py

#!/usr/bin/env python3
import argparse
import json
from pathlib import Path
from typing import Dict

import orjson


def load_jsonl(path: Path):
	with open(path, "r", encoding="utf-8") as f:
		for line in f:
			if line.strip():
				yield json.loads(line)


def main() -> None:
	parser = argparse.ArgumentParser(description="Merge hypothesis texts into base JSONL by id.")
	parser.add_argument("--base", required=True, help="Base JSONL with entries containing id and audio...")
	parser.add_argument("--hyp", required=True, help="Hypothesis JSONL with id,text")
	parser.add_argument("--out", required=True, help="Output JSONL (overwrites base or writes new)")
	args = parser.parse_args()

	hyp_map: Dict[str, str] = {}
	for rec in load_jsonl(Path(args.hyp)):
		txt = (rec.get("text") or "").strip()
		if txt:
			hyp_map[rec["id"]] = txt

	with open(args.out, "w", encoding="utf-8") as out_f:
		for base in load_jsonl(Path(args.base)):
			_id = base["id"]
			if _id in hyp_map:
				base["text"] = hyp_map[_id]
			out_f.write(orjson.dumps(base).decode("utf-8") + "\n")
	print(f"Merged transcripts -> {args.out} (updated {len(hyp_map)} items)")


if __name__ == "__main__":
	main()